Help!!!

i formated my usb storage and my sd card and now my phone doesnt turn on its stuck at the samsung logo screen....recovery and download mode works...i flashed classic rom v6 via odin...the flash goes fine but the phone is stuck at the samsung logo....when i open recovery it says e: failed to mount exfat /dev/block/mmcblkpl /sd card....the big problem is that if it has anything to do with hardware failure i dont have where to fix it because there are not any samsung service centers in my country

I JUST PUT MY EXTERNAL SD CARD IN AN IT DOES NOT GIVE ME THE SD CARD MESSAGE BUT THE PHONE IS STILL STUCK...